<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>05.输入输出</title>
</head>
<body>
<script>
    // 1. 文档输出内容
    document.write('我是div标签');
    document.write('<h1>我是标题</h1>')
    // 2. 控制台打印输出
    console.log("aaa")
    // 3. 输入
    prompt("请输入年龄")
    prompt("请输入年龄")
</script>
</body>
</html>